857161933 has 2 divisors, whose sum is σ = 857161934. Its totient is φ = 857161932.

The previous prime is 857161927. The next prime is 857161979. The reversal of 857161933 is 339161758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 854860644 + 2301289 = 29238^2 + 1517^2 .

It is a cyclic number.

It is not a de Polignac number, because 857161933 - 2⁵ = 857161901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 857161933.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857161993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428580966 + 428580967.

It is an arithmetic number, because the mean of its divisors is an integer number (428580967).

Almost surely, 2^857161933 is an apocalyptic number.

It is an amenable number.

857161933 is a deficient number, since it is larger than the sum of its proper divisors (1).

857161933 is an equidigital number, since it uses as much as digits as its factorization.

857161933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 43.

The square root of 857161933 is about 29277.3279689250. The cubic root of 857161933 is about 949.9212983741.

The spelling of 857161933 in words is "eight hundred fifty-seven million, one hundred sixty-one thousand, nine hundred thirty-three".